Merge tag 'locking-urgent-2026-07-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull futex fix from Ingo Molnar:

 - Fix a futex-requeue deadlock detection regression (Thomas Gleixner)

* tag 'locking-urgent-2026-07-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  futex/requeue: Revert "Prevent NULL pointer dereference in remove_waiter() on self-deadlock""

Author: torvalds

kernel/futex/requeue.c

@@ -645,12 +645,6 @@ int futex_requeue(u32 __user *uaddr1, unsigned int flags1,
 				continue;
 			}
 
-			/* Self-deadlock: non-top waiter already owns the PI futex. */
-			if (rt_mutex_owner(&pi_state->pi_mutex) == this->task) {
-				ret = -EDEADLK;
-				break;
-			}
-
 			ret = rt_mutex_start_proxy_lock(&pi_state->pi_mutex,
 							this->rt_waiter,
 							this->task);